In Tagalog, Kai is an abbreviated version of the word "kaibigan", which means "friend"

In Urdu, Kai is short for "Kainat", meaning "universe". It is usually a nickname, though it can be a real name too. Other nicknames for the same name may include Kaiskii, Kaina and Kaiya

In Welsh, Kai is a popular given name normally spelt Cai, from the Arthurian legend of Sir Kay

In Wolof (Senegalese language) kai means "come"

In Northern Ireland, data indicated that Kai experienced a significant rise in popularity as a male given name from 2002 to 2003. It has become popular in the UK, with many children born in the mid to late 1990s given the name. While it is typically a malegiven name, in recent years it has become popular among females as well.[3]